Apparatus for heating street pavements



, asistir cHARLEsrpENKER, or CHICAGO, ILLiNors, Ass'srnon or' `o itin-.intFria :no ,QLIVE'R'IML f .MACLARER or omcAGo, iLpNors.

' APPARATUS :son .HEATING 'STREET rnviirrnnrs.

Application filed December 28, 1923. Serial No. 633,150:1 l l Th-.is invention relates to ran apparatus forjheating ay street pavement which lis to be repaired and the invention is preferably embodied in an .apparatus which includes a self-propelled vehicle. having-its ypovver unit operatively connected to suitable means y forsupplying a fluid under'pressure toa p hood adapted 'to distribute the fluid over a pre-determined area of the pavementand, having its power unit operatively connectedv yto separate'means for supplying a heated fluid to the hood, the heated fluid forming a mixture With a fluid vunder pressure which mixture heats the pavement,

The object of the invention is broadlyto provide an improved apparatus vfor heating street pavements. v fp f A `furt-her objectof th'eninventionA 1s to f` provide improved means .for producing a mixture of a fluid undery pressure vvithya i heated fluid in` an apparatus for heating street pavements. l Further objects-of my invention will become apparentas'thefdetail description propanying drawings, wherein Fig. -1 is a central longitudinal section through an apparatus lfor heating street pavements, theapparatus embodying my 1n-` vention. Y

Fig. 2 is -a lsection Fig. 1. Fig. 3 is a diagram of a circuit Vwhich I employ in the preferred embodiment `of'my invention.

gresses, reference being hadto the accomon the line' of Referring now to the drawing, the reif-l erence'character l0 designates a truckhaving a chassis 11, an engine 12,l and apropellershaft 13 which is operatively 4connected by a VdiHerential 14 to a plurality of shafts 15 adapted to drive the vrear 'Wheels l'by meansof sprocket chains 17A,v together vvlijth ,suitable sprockets. The engine' 12gis operatively connected to a generator 18 by a chain drive 19. 4` E 'i The chassis 11 supports, by means of a plurality vof vertically disposed side plates 20, a conduit 21 Which .preferablycomp'rises a substantially horizontal passage 22 terminating at one end in a vertically disposed.

. passage 23. The vertically disposed passage 23 forms the discharge outlet ofthe conduit 21 and communicates `with a hood 24 sus-- pended from a plurality of levers 25, aplurality of links 26 and threaded rods 27 being 'indicated at l toothed segment andfthat provided to secure'ythe hood tofthelevers.

The levers 25; are.:rigidlyfsecured interme-M diate their ends to a shaft 2Q- disposed vabove the conduit 21 and rotatably vjournaled in a plurality of vbearing blocks, The hood 24 is counter-balanced by-a yplurality'of Weights 31 pivotally securedtothe.` forward lends of thelevers 25. -lvealis isprovidedfor securingthe hood924inl,apluralitylofrlad o3 j ustedy positions With `respectto "the/'surface of a pavement uponwhich the fr truckv 10y is stationed.- This meanscomprises a lever32 rigidly secured to the shaft 29 .and'suitably connected by a rod 33' to a'lever34 which 'is just'ed positions 'with'. respect to thei pav'ekvment.y l.

`The conduit 2l preferably constructed of sheet metal with a lining of fire brick.

in plurality The forward endof the conduitis adapted to receive asupply of fluid under pressure, the means-for `supplying 'the fiuid under gal'blower 40 having'a dischargeoutletjcon'-v by means of a pipe section 4l. lhefan `(not shown) of the blower` 40. is driven lbya motor 42 rand it is apparent that when Sit ro-v tated by the motor i-trivill supply air under pressure to the conduit 21 which Willdis-k Ycharge the air into" the hood .24'.` i.

" A co`nduitf43:preferably/disposed undern ected tothe forward end of the conduit 21 neath the conduit 2,1 connects v vi'th the 'co'nduit 21 intermediate the ends thereof. "The lovver en'd ofi the conduity 43is open Jtfofthe atmosphere and is provided With ineansfor f, heating any air Which-may flow orfbedravvn lnt'o the conduit. This'kheating means 'preferably-comprises an oil" burner 44'compris`-vr which atomizes oil drawn from a yreservoir 47. The oil burner 44 is supported, in this instance, in a U-shaped bracket 48 depend- 'ing a motor 45adapted to rotate a disk46.v y

ing from the chassis 11. It isreadily un-V derstood thatl the oil burner When in opera tion Will cause a current of air and products of combustion to floW upwardly through the sa i Y pressurepreferably comprising a 'centrifuconduit 43 and that this mixture willibe vheated to a relatively high temperature.

The upper end of the conduit 43 is inclined rearwardly as it meets the conduit 21,

baffle 50 being arranged transversely ofthe conduit 21 immediately in front of' the junction of theconduit 43fwith the *conduitk 21. rlhe baffle 50 preferably forms a continuation of the wall of the conduit 43 and is so arranged that as the air under pressure from the blower 40 passes the baffle it -will create a partial vacuum or induce a being disposed on one side of the conduit 21 and the other tank. being disposed on the other side ofthe con-duit. The tanks 51 are i supported and held in place by a 'plurality of brackets 52 mounted vupon the chassis 11 and byl a plurality of'brackets 53 secured to the side plates 20.`

The generator 18 is operatively connected to the motors 42 and 45 by a suitable circuit which is diagrammatically illustrated in Fig; 3. A conductor 54 connected to one terminalof the generator 18 provides means whereby the generated current may'flow to the motors 42 and 45, a suitable switch 55 vbeing provided in the conductor to control the circuit. The current returnsv to the generator by way of a conductor 56 connected tothe other terminal of the generator. In the operation of the apparatus, the truck is so kpositioned that the hood 24 may be lowered upon a section of pavement which is to be repaired, the position of the' hood being controlled bythe levert 34 by kmeansand in the manner hereinb'efore described. The switch 55 is then closed.` the burner lighted, rand the apparatus left in this 'condition until the selected areaof pavement has been sufficiently heated. The

truck may then be brought to a new posi- My invention lends a high degree of efficiency to an apparatus for heating street pass to the hood. Perfect combustion is inobtaining in the conduit 21 insures the reaction. Thus, a maximum amount of heat energy is released and the fluid mixture delivered to the hood is kept at a suitable temperature `by using a minimum amount of fuel.

l am aware that changes in the struction and arrangement of parts may be made without departing from the spirit and without sacrificing the advantages of the inventiony and I reserve the right to make all such changes as fairly fall within the scope of the following claims.

` Iclaim:

1. An apparatus for heating street pavements, comprising va vehicle, a substantially horizontal conduit carried by the vehicle and having its vouter end terminating'in a downturned elbow, an open bottomed hood carried by the elbow, an upright conduitl having an open-lower end and communicating at its upper end with the horizontal conduit through thebottom thereof, t-he front wall of the upright conduit having an extension projecting rearwardlyinto the horizontal conduit and overhanging the top of the upright conduit, an oil burner mounted in the open lower end portion of the upright conduit, and a blower' communicating with the forward end of the horizontal conduit.

2. An apparatus for heating street pavements, comprising a vehicle, a substantially horizontal conduit carried by the vehicle with its outer end extending beyond the vehicle and terminating in a downturned elbow,I an open bottom hood carried by the elbow, an upright conduit open at its bottom end and communicating at its lupper end with the horizontal conduit through the bottom thereof,

form, con-y leu the front wall of the upright conduit having an extension projecting rearwardly into the horizontal conduit and overhanging the top of the upright conduit, an oil burner mounted at the bottom of the upright conduitand including a rotatable atomizing ele- ,f

ment within t-he conduit, a fuel tank carried by the vehicle and communicating` with the oil burner, and a'lblower carried by the vehicle and communicating with the forward end of the horizontal conduit.

CHARLES T, Daumen.

ll i) 

